Caching - Simply Explained 

I did 4 years of computer systems engineering in 1993 and this is far clearer than any explanation I got at the time. lol. Im constantly amazed by how much better youtube videos are than older forms of learning.

Examples are the best way to make someone understand.

With the book/library example I think a better analogy would be: You take a PHOTOCOPY of some of the book's pages home with you - that way you have a local copy of the information you need (cached data). The data is up-to-date at the moment you took it from the library, but here lies the typical problem with cached data: If the original author of that book decides to update the original copy at the library, then your copy of the data (your photocopy) is no longer up-to-date and you need to go and get a new photocopy from the updated book at the library (clear your cache)

An excellent, easy to understand explanation of cache! Thank you very much for this!!

No way to dislike the video, examples was very real.

I already knew what is a cache but I have never think that it could be explain that much simple. I am sure that I will use that examples some where in my life. Thank you for this awesome video.

while other videos got me to understand the importance of caching, this one got me to understand WHY caching at different levels (cpu vs HDD) is so important

Thank you *so much!* This was the fifth video I watched trying to understand the principles of cache. Now I get it. 👍

The library analogy is really good.

excellent video, it blew my mind how easily you could explain this subject, thanks so much!

This is the best way to explain cache! Understood it in 5 min

Very nice video. Thanks for teaching us what is the Cache. Keep doing your great work :D

Absolute lifesaver. Thank you!

This unlocked a door for me I didn't know existed in a completely different department yet relative to computers which simplified things much more for me! Thank you for providing a key! 😎

Just started watching NoSQL video and subscribed. Brilliant explanation !!

Very well explained, thank you!

Thanks for the explanation. Great job.!

Wow! Could understand very easily! Great 👍

Best explanation among others videos. Thanks

Exactly what I needed!

Great video! Thank you

Really loved this. thank you

Simply explained ! for REAL !!

Thank you for the explanation!

I liked a lot the animation, keep up with the good work ;)

glad to see you listen to lex as well

Amazing..keep up the good explanation sir

wow you hit it, dude you are amazing

awesome explanation

Quite informative 👍

Cool info=) Thank you!

Amazing explanation. I hope I can cache this explanation somewhere close by in my memory haha😂. You’re Dutch right?! Your accent sounds like it.

Awesome video!

Thanks for video, awesome!

Perfection in a video

Great explanation 👍👍

compression, encryption, and error detection of messages over a connection is also something that was mostly figured out before consumer desktops even existed

Nice explanation 👍

Now what's the difference between a cache and a buffer? The buffer is the suitcase that you use to take the books from the library to your house. For example, if you want to print a document, you will put it into your printer's buffer and the printer will take it from there.

This was brilliant

Simply understood 👌

Good explanation bro🙂👍🏽

perfect! thank U!

Great Content :)

Nice example this helps

Explain nicely

Wow, great explanation, and a lot of effort are put in your videos to be engaging and easy to understand. Subbed. Also your RU-vid recommendations are very similar to mine xD at 1:24. Do you do all the editing and script on your own?

FINALLY I CAN SEE!!

thanks!

thank you

I once compiler chromium for my linux System and I did not enabled ccache. As progress grow The build speed got slower and slower. After enabling ccache it helped me quiet a lot.

What is the difference between cache and buffer?

I have doubt regarding caching Consider I have "cache aside pattern" and "in memory cache" in application server is used. I'm looking for Invalidation logic when there is an update. This was the context. I read for critical data like password/financial information we use Write Back policy to ensure consistency. In write through one instance's in memory cache entry gets updated and others can remain stale. So, there is inconsistency in write through My question is same can happen in Write Back, one instance's in memory cache entry gets deleted(invalidated) and we update DB..other instances in memory cache still have that entry. So there is inconsistency in write Back as well? Why do we prefer write back for critical data because same issue is there in write back. If answer is invalidate all instances' in memory cache entry then same can be done for Write through. Which makes me ask question 2. My another question is : We can update all instances' in memory cache entry and then update DB. In this way consistency is maintained so why not we use Write through for critical data like password financial information?

how can i make animation as he does ? which tools (way) ?

👍

where have you been?

This books in a library analogy won't hold up. It will be like renting movies from Blockbuster.....

Lex Friedmen, hell yea

cool, now explain now redis works. xD

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